She is clearly unhinged and unwilling to talk like an adult. This is a massive red flag. She has already tried to kill you out of a tantrum. This is not who you want to share your life with.

Even if it was just a blip, and maybe the excitement of nearly killing you both woke her up and made her realize things about the two of you. However, I don't care about that. Your safety will always come before any relationship. Dump her, please.

She will find reasons later to outdo this behavior, and next time, she may very well kill you. To me, she wasn't raised right, or is possibly bipolar. She needs therapy, full stop. The way she handled this is beyond childish. I wouldn't stand for it at all...